US2637168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for transmitting oscillatory motion of a known frequency and suppressing superimposed oscillatory motions of other frequencies
Assignee: Pilkington Group Ltd
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Filing: 1951-09-01
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Granted: 1953-05-05
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Expires: 1971-09-01
Abstract
No abstract record available.
Inventors
- 👤 Davison Richard
- 👤 Barradell-Smith Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:51
CPC Classifications
G; G01; G01M; G01M7/00; B; B61; B61L; B61L1/00; B61L1/02; B61L1/04; B61L1/045; F; F15; F15B; F15B21/00; F16; F16F; F16F15/00; F16F15/02; F16F15/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |